<?php
/**
 * CNumberValidator class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CNumberValidator validates that the attribute value is a number.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CNumberValidator.php 3190 2011-04-16 23:40:21Z qiang.xue $
 * @package system.validators
 * @since 1.0
 */
class CNumberValidator extends CValidator
{
    /**
     * @var boolean whether the attribute value can only be an integer. Defaults to false.
     */
    public $integerOnly=false;
    /**
     * @var boolean whether the attribute value can be null or empty. Defaults to true,
     * meaning that if the attribute is empty, it is considered valid.
     */
    public $allowEmpty=true;
    /**
     * @var integer|float upper limit of the number. Defaults to null, meaning no upper limit.
     */
    public $max;
    /**
     * @var integer|float lower limit of the number. Defaults to null, meaning no lower limit.
     */
    public $min;
    /**
     * @var string user-defined error message used when the value is too big.
     */
    public $tooBig;
    /**
     * @var string user-defined error message used when the value is too small.
     */
    public $tooSmall;
    /**
     * @var string the regular expression for matching integers.
     * @since 1.1.7
     */
    public $integerPattern='/^\s*[+-]?\d+\s*$/';
    /**
     * @var string the regular expression for matching numbers.
     * @since 1.1.7
     */
    public $numberPattern='/^\s*[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?\s*$/';


    /**
     * Validates the attribute of the object.
     * If there is any error, the error message is added to the object.
     * @param CModel $object the object being validated
     * @param string $attribute the attribute being validated
     */
    protected function validateAttribute($object,$attribute)
    {
        $value=$object->$attribute;
        if($this->allowEmpty && $this->isEmpty($value))
        return;
        if($this->integerOnly)
        {
            if(!preg_match($this->integerPattern,"$value"))
            {
                $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be an integer.');
                $this->addError($object,$attribute,$message);
            }
        }
        else
        {
            if(!preg_match($this->numberPattern,"$value"))
            {
                $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be a number.');
                $this->addError($object,$attribute,$message);
            }
        }
        if($this->min!==null && $value<$this->min)
        {
            $message=$this->tooSmall!==null?$this->tooSmall:Yii::t('yii','{attribute} is too small (minimum is {min}).');
            $this->addError($object,$attribute,$message,array('{min}'=>$this->min));
        }
        if($this->max!==null && $value>$this->max)
        {
            $message=$this->tooBig!==null?$this->tooBig:Yii::t('yii','{attribute} is too big (maximum is {max}).');
            $this->addError($object,$attribute,$message,array('{max}'=>$this->max));
        }
    }

    /**
     * Returns the JavaScript needed for performing client-side validation.
     * @param CModel $object the data object being validated
     * @param string $attribute the name of the attribute to be validated.
     * @return string the client-side validation script.
     * @see CActiveForm::enableClientValidation
     * @since 1.1.7
     */
    public function clientValidateAttribute($object,$attribute)
    {
        $label=$object->getAttributeLabel($attribute);

        if(($message=$this->message)===null)
        $message=$this->integerOnly ? Yii::t('yii','{attribute} must be an integer.') : Yii::t('yii','{attribute} must be a number.');
        $message=strtr($message, array(
			'{attribute}'=>$label,
        ));

        if(($tooBig=$this->tooBig)===null)
        $tooBig=Yii::t('yii','{attribute} is too big (maximum is {max}).');
        $tooBig=strtr($tooBig, array(
			'{attribute}'=>$label,
			'{max}'=>$this->max,
        ));

        if(($tooSmall=$this->tooSmall)===null)
        $tooSmall=Yii::t('yii','{attribute} is too small (minimum is {min}).');
        $tooSmall=strtr($tooSmall, array(
			'{attribute}'=>$label,
			'{min}'=>$this->min,
        ));

        $pattern=$this->integerOnly ? $this->integerPattern : $this->numberPattern;
        $js="
if(!value.match($pattern)) {
	messages.push(".CJSON::encode($message).");
}
";
        if($this->min!==null)
        {
            $js.="
if(value<{$this->min}) {
	messages.push(".CJSON::encode($tooSmall).");
}
";
        }
        if($this->max!==null)
        {
            $js.="
if(value>{$this->max}) {
	messages.push(".CJSON::encode($tooBig).");
}
";
        }

        if($this->allowEmpty)
        {
            $js="
if($.trim(value)!='') {
$js
}
";
        }

        return $js;
    }
}
